"Press Setup (F3) to set the Test Duration andPass/Fail limit. Use the arrow keys to highlight and set.The pass/fail limit can be calculated whilst in this modeby pressing Calc (F3). Enter the type and length ofcable and a new limit will be calculated. This can beoverridden by selecting the limit from the list. Press OK(F4) when complete."

On your PT300 head into the User Options and Test Options, at this point there will be a option for On Test Failure - Change this to Fail Menu.

When performing any Earth Bond test if you get a failure it will produce a pop up asking for your next move, in this instance select Restart Test. You will be taken back to the test screen, and F3 will now have "Calc" Displayed.

Press this put in your cable characteristics and the limit will be recalculated allowing you to go on and test.

Note this calculator has a maximum length of 24m, anything more it would be best to create a dedicated sequence for, and use the IEE look up tables to calculate your limit, then add this to the sequence.